ci/lib.sh: encapsulate Travis-specific things

diff --git a/ci/test-documentation.sh b/ci/test-documentation.sh
index a20de9ca127f82ba916534dfb12f3932595dda05..7d0beb28327633505e0f52bde88c8430bacd9673 100755 (executable)
--- a/ci/test-documentation.sh
+++ b/ci/test-documentation.sh
@@ -3,8 +3,9 @@
 # Perform sanity checks on documentation and build it.
 #
 
-. ${0%/*}/lib-travisci.sh
+. ${0%/*}/lib.sh
 
+test -n "$ALREADY_HAVE_ASCIIDOCTOR" ||
 gem install asciidoctor
 
 make check-builtins